Solve. A lamp shade has the geometric form shown below. The total surface area of a lamp shade with slant height s and top and bottom base radii of r2 and r1, respectively, is given by the expression  Factor this expression. 

A. ?(r12 + r22 + sr1 + sr2)
B. ?(r1 + r2)(r1 + r2 + sr1r2)
C. ?(r1 + r2)(r1 + r2 + s)
D. ?r1(r1 +  + sr1 + sr2)

Answer: A

Mathematics

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